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![Jean Delvare](/assets/img/avatar_default.png)
The new-style fschmd driver implements the optional detect() callback to cover the use cases of the legacy driver. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Hans de Goede <j.w.r.degoede@hhs.nl>
866 lines
26 KiB
C
866 lines
26 KiB
C
/* fschmd.c
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*
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* Copyright (C) 2007 Hans de Goede <j.w.r.degoede@hhs.nl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* Merged Fujitsu Siemens hwmon driver, supporting the Poseidon, Hermes,
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* Scylla, Heracles and Heimdall chips
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*
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* Based on the original 2.4 fscscy, 2.6 fscpos, 2.6 fscher and 2.6
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* (candidate) fschmd drivers:
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* Copyright (C) 2006 Thilo Cestonaro
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* <thilo.cestonaro.external@fujitsu-siemens.com>
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* Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch>
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* Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@gmx.de>
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* Copyright (c) 2001 Martin Knoblauch <mkn@teraport.de, knobi@knobisoft.de>
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* Copyright (C) 2000 Hermann Jung <hej@odn.de>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/sysfs.h>
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#include <linux/dmi.h>
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/* Addresses to scan */
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static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
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/* Insmod parameters */
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I2C_CLIENT_INSMOD_5(fscpos, fscher, fscscy, fschrc, fschmd);
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/*
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* The FSCHMD registers and other defines
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*/
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/* chip identification */
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#define FSCHMD_REG_IDENT_0 0x00
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#define FSCHMD_REG_IDENT_1 0x01
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#define FSCHMD_REG_IDENT_2 0x02
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#define FSCHMD_REG_REVISION 0x03
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/* global control and status */
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#define FSCHMD_REG_EVENT_STATE 0x04
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#define FSCHMD_REG_CONTROL 0x05
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#define FSCHMD_CONTROL_ALERT_LED_MASK 0x01
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/* watchdog (support to be implemented) */
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#define FSCHMD_REG_WDOG_PRESET 0x28
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#define FSCHMD_REG_WDOG_STATE 0x23
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#define FSCHMD_REG_WDOG_CONTROL 0x21
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/* voltages, weird order is to keep the same order as the old drivers */
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static const u8 FSCHMD_REG_VOLT[3] = { 0x45, 0x42, 0x48 };
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/* minimum pwm at which the fan is driven (pwm can by increased depending on
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the temp. Notice that for the scy some fans share there minimum speed.
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Also notice that with the scy the sensor order is different then with the
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other chips, this order was in the 2.4 driver and kept for consistency. */
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static const u8 FSCHMD_REG_FAN_MIN[5][6] = {
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{ 0x55, 0x65 }, /* pos */
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{ 0x55, 0x65, 0xb5 }, /* her */
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{ 0x65, 0x65, 0x55, 0xa5, 0x55, 0xa5 }, /* scy */
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{ 0x55, 0x65, 0xa5, 0xb5 }, /* hrc */
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{ 0x55, 0x65, 0xa5, 0xb5, 0xc5 }, /* hmd */
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};
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/* actual fan speed */
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static const u8 FSCHMD_REG_FAN_ACT[5][6] = {
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{ 0x0e, 0x6b, 0xab }, /* pos */
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{ 0x0e, 0x6b, 0xbb }, /* her */
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{ 0x6b, 0x6c, 0x0e, 0xab, 0x5c, 0xbb }, /* scy */
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{ 0x0e, 0x6b, 0xab, 0xbb }, /* hrc */
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{ 0x5b, 0x6b, 0xab, 0xbb, 0xcb }, /* hmd */
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};
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/* fan status registers */
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static const u8 FSCHMD_REG_FAN_STATE[5][6] = {
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{ 0x0d, 0x62, 0xa2 }, /* pos */
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{ 0x0d, 0x62, 0xb2 }, /* her */
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{ 0x62, 0x61, 0x0d, 0xa2, 0x52, 0xb2 }, /* scy */
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{ 0x0d, 0x62, 0xa2, 0xb2 }, /* hrc */
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{ 0x52, 0x62, 0xa2, 0xb2, 0xc2 }, /* hmd */
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};
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/* fan ripple / divider registers */
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static const u8 FSCHMD_REG_FAN_RIPPLE[5][6] = {
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{ 0x0f, 0x6f, 0xaf }, /* pos */
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{ 0x0f, 0x6f, 0xbf }, /* her */
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{ 0x6f, 0x6f, 0x0f, 0xaf, 0x0f, 0xbf }, /* scy */
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{ 0x0f, 0x6f, 0xaf, 0xbf }, /* hrc */
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{ 0x5f, 0x6f, 0xaf, 0xbf, 0xcf }, /* hmd */
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};
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static const int FSCHMD_NO_FAN_SENSORS[5] = { 3, 3, 6, 4, 5 };
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/* Fan status register bitmasks */
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#define FSCHMD_FAN_ALARM_MASK 0x04 /* called fault by FSC! */
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#define FSCHMD_FAN_NOT_PRESENT_MASK 0x08 /* not documented */
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/* actual temperature registers */
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static const u8 FSCHMD_REG_TEMP_ACT[5][5] = {
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{ 0x64, 0x32, 0x35 }, /* pos */
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{ 0x64, 0x32, 0x35 }, /* her */
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{ 0x64, 0xD0, 0x32, 0x35 }, /* scy */
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{ 0x64, 0x32, 0x35 }, /* hrc */
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{ 0x70, 0x80, 0x90, 0xd0, 0xe0 }, /* hmd */
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};
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/* temperature state registers */
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static const u8 FSCHMD_REG_TEMP_STATE[5][5] = {
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{ 0x71, 0x81, 0x91 }, /* pos */
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{ 0x71, 0x81, 0x91 }, /* her */
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{ 0x71, 0xd1, 0x81, 0x91 }, /* scy */
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{ 0x71, 0x81, 0x91 }, /* hrc */
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{ 0x71, 0x81, 0x91, 0xd1, 0xe1 }, /* hmd */
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};
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/* temperature high limit registers, FSC does not document these. Proven to be
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there with field testing on the fscher and fschrc, already supported / used
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in the fscscy 2.4 driver. FSC has confirmed that the fschmd has registers
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at these addresses, but doesn't want to confirm they are the same as with
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the fscher?? */
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static const u8 FSCHMD_REG_TEMP_LIMIT[5][5] = {
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{ 0, 0, 0 }, /* pos */
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{ 0x76, 0x86, 0x96 }, /* her */
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{ 0x76, 0xd6, 0x86, 0x96 }, /* scy */
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{ 0x76, 0x86, 0x96 }, /* hrc */
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{ 0x76, 0x86, 0x96, 0xd6, 0xe6 }, /* hmd */
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};
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/* These were found through experimenting with an fscher, currently they are
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not used, but we keep them around for future reference.
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static const u8 FSCHER_REG_TEMP_AUTOP1[] = { 0x73, 0x83, 0x93 };
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static const u8 FSCHER_REG_TEMP_AUTOP2[] = { 0x75, 0x85, 0x95 }; */
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static const int FSCHMD_NO_TEMP_SENSORS[5] = { 3, 3, 4, 3, 5 };
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/* temp status register bitmasks */
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#define FSCHMD_TEMP_WORKING_MASK 0x01
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#define FSCHMD_TEMP_ALERT_MASK 0x02
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/* there only really is an alarm if the sensor is working and alert == 1 */
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#define FSCHMD_TEMP_ALARM_MASK \
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(FSCHMD_TEMP_WORKING_MASK | FSCHMD_TEMP_ALERT_MASK)
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/* our driver name */
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#define FSCHMD_NAME "fschmd"
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/*
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* Functions declarations
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*/
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static int fschmd_probe(struct i2c_client *client,
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const struct i2c_device_id *id);
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static int fschmd_detect(struct i2c_client *client, int kind,
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struct i2c_board_info *info);
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static int fschmd_remove(struct i2c_client *client);
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static struct fschmd_data *fschmd_update_device(struct device *dev);
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/*
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* Driver data (common to all clients)
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*/
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static const struct i2c_device_id fschmd_id[] = {
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{ "fscpos", fscpos },
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{ "fscher", fscher },
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{ "fscscy", fscscy },
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{ "fschrc", fschrc },
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{ "fschmd", fschmd },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, fschmd_id);
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static struct i2c_driver fschmd_driver = {
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.class = I2C_CLASS_HWMON,
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.driver = {
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.name = FSCHMD_NAME,
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},
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.probe = fschmd_probe,
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.remove = fschmd_remove,
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.id_table = fschmd_id,
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.detect = fschmd_detect,
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.address_data = &addr_data,
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};
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/*
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* Client data (each client gets its own)
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*/
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struct fschmd_data {
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struct device *hwmon_dev;
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struct mutex update_lock;
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int kind;
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char valid; /* zero until following fields are valid */
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unsigned long last_updated; /* in jiffies */
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/* register values */
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u8 global_control; /* global control register */
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u8 volt[3]; /* 12, 5, battery voltage */
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u8 temp_act[5]; /* temperature */
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u8 temp_status[5]; /* status of sensor */
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u8 temp_max[5]; /* high temp limit, notice: undocumented! */
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u8 fan_act[6]; /* fans revolutions per second */
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u8 fan_status[6]; /* fan status */
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u8 fan_min[6]; /* fan min value for rps */
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u8 fan_ripple[6]; /* divider for rps */
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};
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/* Global variables to hold information read from special DMI tables, which are
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available on FSC machines with an fscher or later chip. */
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static int dmi_mult[3] = { 490, 200, 100 };
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static int dmi_offset[3] = { 0, 0, 0 };
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static int dmi_vref = -1;
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/*
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* Sysfs attr show / store functions
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*/
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static ssize_t show_in_value(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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const int max_reading[3] = { 14200, 6600, 3300 };
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = fschmd_update_device(dev);
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/* fscher / fschrc - 1 as data->kind is an array index, not a chips */
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if (data->kind == (fscher - 1) || data->kind >= (fschrc - 1))
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return sprintf(buf, "%d\n", (data->volt[index] * dmi_vref *
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dmi_mult[index]) / 255 + dmi_offset[index]);
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else
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return sprintf(buf, "%d\n", (data->volt[index] *
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max_reading[index] + 128) / 255);
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}
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#define TEMP_FROM_REG(val) (((val) - 128) * 1000)
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static ssize_t show_temp_value(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = fschmd_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[index]));
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}
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static ssize_t show_temp_max(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = fschmd_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index]));
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}
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static ssize_t store_temp_max(struct device *dev, struct device_attribute
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*devattr, const char *buf, size_t count)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = dev_get_drvdata(dev);
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long v = simple_strtol(buf, NULL, 10) / 1000;
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v = SENSORS_LIMIT(v, -128, 127) + 128;
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mutex_lock(&data->update_lock);
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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FSCHMD_REG_TEMP_LIMIT[data->kind][index], v);
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data->temp_max[index] = v;
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_temp_fault(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = fschmd_update_device(dev);
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/* bit 0 set means sensor working ok, so no fault! */
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if (data->temp_status[index] & FSCHMD_TEMP_WORKING_MASK)
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return sprintf(buf, "0\n");
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else
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return sprintf(buf, "1\n");
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}
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static ssize_t show_temp_alarm(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = fschmd_update_device(dev);
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if ((data->temp_status[index] & FSCHMD_TEMP_ALARM_MASK) ==
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FSCHMD_TEMP_ALARM_MASK)
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return sprintf(buf, "1\n");
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else
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return sprintf(buf, "0\n");
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}
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#define RPM_FROM_REG(val) ((val) * 60)
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static ssize_t show_fan_value(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = fschmd_update_device(dev);
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return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[index]));
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}
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static ssize_t show_fan_div(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = fschmd_update_device(dev);
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/* bits 2..7 reserved => mask with 3 */
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return sprintf(buf, "%d\n", 1 << (data->fan_ripple[index] & 3));
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}
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static ssize_t store_fan_div(struct device *dev, struct device_attribute
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*devattr, const char *buf, size_t count)
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{
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u8 reg;
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = dev_get_drvdata(dev);
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/* supported values: 2, 4, 8 */
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unsigned long v = simple_strtoul(buf, NULL, 10);
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switch (v) {
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case 2: v = 1; break;
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case 4: v = 2; break;
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case 8: v = 3; break;
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default:
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dev_err(dev, "fan_div value %lu not supported. "
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"Choose one of 2, 4 or 8!\n", v);
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return -EINVAL;
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}
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mutex_lock(&data->update_lock);
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reg = i2c_smbus_read_byte_data(to_i2c_client(dev),
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FSCHMD_REG_FAN_RIPPLE[data->kind][index]);
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/* bits 2..7 reserved => mask with 0x03 */
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reg &= ~0x03;
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reg |= v;
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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FSCHMD_REG_FAN_RIPPLE[data->kind][index], reg);
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data->fan_ripple[index] = reg;
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_fan_alarm(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = fschmd_update_device(dev);
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if (data->fan_status[index] & FSCHMD_FAN_ALARM_MASK)
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return sprintf(buf, "1\n");
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else
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return sprintf(buf, "0\n");
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}
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static ssize_t show_fan_fault(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = fschmd_update_device(dev);
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if (data->fan_status[index] & FSCHMD_FAN_NOT_PRESENT_MASK)
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return sprintf(buf, "1\n");
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else
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return sprintf(buf, "0\n");
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}
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static ssize_t show_pwm_auto_point1_pwm(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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int val = fschmd_update_device(dev)->fan_min[index];
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/* 0 = allow turning off, 1-255 = 50-100% */
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if (val)
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val = val / 2 + 128;
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return sprintf(buf, "%d\n", val);
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}
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static ssize_t store_pwm_auto_point1_pwm(struct device *dev,
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struct device_attribute *devattr, const char *buf, size_t count)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct fschmd_data *data = dev_get_drvdata(dev);
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unsigned long v = simple_strtoul(buf, NULL, 10);
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/* register: 0 = allow turning off, 1-255 = 50-100% */
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if (v) {
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v = SENSORS_LIMIT(v, 128, 255);
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v = (v - 128) * 2 + 1;
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}
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mutex_lock(&data->update_lock);
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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FSCHMD_REG_FAN_MIN[data->kind][index], v);
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data->fan_min[index] = v;
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mutex_unlock(&data->update_lock);
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return count;
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|
}
|
|
|
|
|
|
/* The FSC hwmon family has the ability to force an attached alert led to flash
|
|
from software, we export this as an alert_led sysfs attr */
|
|
static ssize_t show_alert_led(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct fschmd_data *data = fschmd_update_device(dev);
|
|
|
|
if (data->global_control & FSCHMD_CONTROL_ALERT_LED_MASK)
|
|
return sprintf(buf, "1\n");
|
|
else
|
|
return sprintf(buf, "0\n");
|
|
}
|
|
|
|
static ssize_t store_alert_led(struct device *dev,
|
|
struct device_attribute *devattr, const char *buf, size_t count)
|
|
{
|
|
u8 reg;
|
|
struct fschmd_data *data = dev_get_drvdata(dev);
|
|
unsigned long v = simple_strtoul(buf, NULL, 10);
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
reg = i2c_smbus_read_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL);
|
|
|
|
if (v)
|
|
reg |= FSCHMD_CONTROL_ALERT_LED_MASK;
|
|
else
|
|
reg &= ~FSCHMD_CONTROL_ALERT_LED_MASK;
|
|
|
|
i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL, reg);
|
|
|
|
data->global_control = reg;
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return count;
|
|
}
|
|
|
|
static struct sensor_device_attribute fschmd_attr[] = {
|
|
SENSOR_ATTR(in0_input, 0444, show_in_value, NULL, 0),
|
|
SENSOR_ATTR(in1_input, 0444, show_in_value, NULL, 1),
|
|
SENSOR_ATTR(in2_input, 0444, show_in_value, NULL, 2),
|
|
SENSOR_ATTR(alert_led, 0644, show_alert_led, store_alert_led, 0),
|
|
};
|
|
|
|
static struct sensor_device_attribute fschmd_temp_attr[] = {
|
|
SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0),
|
|
SENSOR_ATTR(temp1_max, 0644, show_temp_max, store_temp_max, 0),
|
|
SENSOR_ATTR(temp1_fault, 0444, show_temp_fault, NULL, 0),
|
|
SENSOR_ATTR(temp1_alarm, 0444, show_temp_alarm, NULL, 0),
|
|
SENSOR_ATTR(temp2_input, 0444, show_temp_value, NULL, 1),
|
|
SENSOR_ATTR(temp2_max, 0644, show_temp_max, store_temp_max, 1),
|
|
SENSOR_ATTR(temp2_fault, 0444, show_temp_fault, NULL, 1),
|
|
SENSOR_ATTR(temp2_alarm, 0444, show_temp_alarm, NULL, 1),
|
|
SENSOR_ATTR(temp3_input, 0444, show_temp_value, NULL, 2),
|
|
SENSOR_ATTR(temp3_max, 0644, show_temp_max, store_temp_max, 2),
|
|
SENSOR_ATTR(temp3_fault, 0444, show_temp_fault, NULL, 2),
|
|
SENSOR_ATTR(temp3_alarm, 0444, show_temp_alarm, NULL, 2),
|
|
SENSOR_ATTR(temp4_input, 0444, show_temp_value, NULL, 3),
|
|
SENSOR_ATTR(temp4_max, 0644, show_temp_max, store_temp_max, 3),
|
|
SENSOR_ATTR(temp4_fault, 0444, show_temp_fault, NULL, 3),
|
|
SENSOR_ATTR(temp4_alarm, 0444, show_temp_alarm, NULL, 3),
|
|
SENSOR_ATTR(temp5_input, 0444, show_temp_value, NULL, 4),
|
|
SENSOR_ATTR(temp5_max, 0644, show_temp_max, store_temp_max, 4),
|
|
SENSOR_ATTR(temp5_fault, 0444, show_temp_fault, NULL, 4),
|
|
SENSOR_ATTR(temp5_alarm, 0444, show_temp_alarm, NULL, 4),
|
|
};
|
|
|
|
static struct sensor_device_attribute fschmd_fan_attr[] = {
|
|
SENSOR_ATTR(fan1_input, 0444, show_fan_value, NULL, 0),
|
|
SENSOR_ATTR(fan1_div, 0644, show_fan_div, store_fan_div, 0),
|
|
SENSOR_ATTR(fan1_alarm, 0444, show_fan_alarm, NULL, 0),
|
|
SENSOR_ATTR(fan1_fault, 0444, show_fan_fault, NULL, 0),
|
|
SENSOR_ATTR(pwm1_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
|
|
store_pwm_auto_point1_pwm, 0),
|
|
SENSOR_ATTR(fan2_input, 0444, show_fan_value, NULL, 1),
|
|
SENSOR_ATTR(fan2_div, 0644, show_fan_div, store_fan_div, 1),
|
|
SENSOR_ATTR(fan2_alarm, 0444, show_fan_alarm, NULL, 1),
|
|
SENSOR_ATTR(fan2_fault, 0444, show_fan_fault, NULL, 1),
|
|
SENSOR_ATTR(pwm2_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
|
|
store_pwm_auto_point1_pwm, 1),
|
|
SENSOR_ATTR(fan3_input, 0444, show_fan_value, NULL, 2),
|
|
SENSOR_ATTR(fan3_div, 0644, show_fan_div, store_fan_div, 2),
|
|
SENSOR_ATTR(fan3_alarm, 0444, show_fan_alarm, NULL, 2),
|
|
SENSOR_ATTR(fan3_fault, 0444, show_fan_fault, NULL, 2),
|
|
SENSOR_ATTR(pwm3_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
|
|
store_pwm_auto_point1_pwm, 2),
|
|
SENSOR_ATTR(fan4_input, 0444, show_fan_value, NULL, 3),
|
|
SENSOR_ATTR(fan4_div, 0644, show_fan_div, store_fan_div, 3),
|
|
SENSOR_ATTR(fan4_alarm, 0444, show_fan_alarm, NULL, 3),
|
|
SENSOR_ATTR(fan4_fault, 0444, show_fan_fault, NULL, 3),
|
|
SENSOR_ATTR(pwm4_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
|
|
store_pwm_auto_point1_pwm, 3),
|
|
SENSOR_ATTR(fan5_input, 0444, show_fan_value, NULL, 4),
|
|
SENSOR_ATTR(fan5_div, 0644, show_fan_div, store_fan_div, 4),
|
|
SENSOR_ATTR(fan5_alarm, 0444, show_fan_alarm, NULL, 4),
|
|
SENSOR_ATTR(fan5_fault, 0444, show_fan_fault, NULL, 4),
|
|
SENSOR_ATTR(pwm5_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
|
|
store_pwm_auto_point1_pwm, 4),
|
|
SENSOR_ATTR(fan6_input, 0444, show_fan_value, NULL, 5),
|
|
SENSOR_ATTR(fan6_div, 0644, show_fan_div, store_fan_div, 5),
|
|
SENSOR_ATTR(fan6_alarm, 0444, show_fan_alarm, NULL, 5),
|
|
SENSOR_ATTR(fan6_fault, 0444, show_fan_fault, NULL, 5),
|
|
SENSOR_ATTR(pwm6_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
|
|
store_pwm_auto_point1_pwm, 5),
|
|
};
|
|
|
|
|
|
/*
|
|
* Real code
|
|
*/
|
|
|
|
/* DMI decode routine to read voltage scaling factors from special DMI tables,
|
|
which are available on FSC machines with an fscher or later chip. */
|
|
static void fschmd_dmi_decode(const struct dmi_header *header)
|
|
{
|
|
int i, mult[3] = { 0 }, offset[3] = { 0 }, vref = 0, found = 0;
|
|
|
|
/* dmi code ugliness, we get passed the address of the contents of
|
|
a complete DMI record, but in the form of a dmi_header pointer, in
|
|
reality this address holds header->length bytes of which the header
|
|
are the first 4 bytes */
|
|
u8 *dmi_data = (u8 *)header;
|
|
|
|
/* We are looking for OEM-specific type 185 */
|
|
if (header->type != 185)
|
|
return;
|
|
|
|
/* we are looking for what Siemens calls "subtype" 19, the subtype
|
|
is stored in byte 5 of the dmi block */
|
|
if (header->length < 5 || dmi_data[4] != 19)
|
|
return;
|
|
|
|
/* After the subtype comes 1 unknown byte and then blocks of 5 bytes,
|
|
consisting of what Siemens calls an "Entity" number, followed by
|
|
2 16-bit words in LSB first order */
|
|
for (i = 6; (i + 4) < header->length; i += 5) {
|
|
/* entity 1 - 3: voltage multiplier and offset */
|
|
if (dmi_data[i] >= 1 && dmi_data[i] <= 3) {
|
|
/* Our in sensors order and the DMI order differ */
|
|
const int shuffle[3] = { 1, 0, 2 };
|
|
int in = shuffle[dmi_data[i] - 1];
|
|
|
|
/* Check for twice the same entity */
|
|
if (found & (1 << in))
|
|
return;
|
|
|
|
mult[in] = dmi_data[i + 1] | (dmi_data[i + 2] << 8);
|
|
offset[in] = dmi_data[i + 3] | (dmi_data[i + 4] << 8);
|
|
|
|
found |= 1 << in;
|
|
}
|
|
|
|
/* entity 7: reference voltage */
|
|
if (dmi_data[i] == 7) {
|
|
/* Check for twice the same entity */
|
|
if (found & 0x08)
|
|
return;
|
|
|
|
vref = dmi_data[i + 1] | (dmi_data[i + 2] << 8);
|
|
|
|
found |= 0x08;
|
|
}
|
|
}
|
|
|
|
if (found == 0x0F) {
|
|
for (i = 0; i < 3; i++) {
|
|
dmi_mult[i] = mult[i] * 10;
|
|
dmi_offset[i] = offset[i] * 10;
|
|
}
|
|
dmi_vref = vref;
|
|
}
|
|
}
|
|
|
|
static int fschmd_detect(struct i2c_client *client, int kind,
|
|
struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
const char * const client_names[5] = { "fscpos", "fscher", "fscscy",
|
|
"fschrc", "fschmd" };
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* Detect & Identify the chip */
|
|
if (kind <= 0) {
|
|
char id[4];
|
|
|
|
id[0] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_IDENT_0);
|
|
id[1] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_IDENT_1);
|
|
id[2] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_IDENT_2);
|
|
id[3] = '\0';
|
|
|
|
if (!strcmp(id, "PEG"))
|
|
kind = fscpos;
|
|
else if (!strcmp(id, "HER"))
|
|
kind = fscher;
|
|
else if (!strcmp(id, "SCY"))
|
|
kind = fscscy;
|
|
else if (!strcmp(id, "HRC"))
|
|
kind = fschrc;
|
|
else if (!strcmp(id, "HMD"))
|
|
kind = fschmd;
|
|
else
|
|
return -ENODEV;
|
|
}
|
|
|
|
strlcpy(info->type, client_names[kind - 1], I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fschmd_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct fschmd_data *data;
|
|
u8 revision;
|
|
const char * const names[5] = { "Poseidon", "Hermes", "Scylla",
|
|
"Heracles", "Heimdall" };
|
|
int i, err;
|
|
enum chips kind = id->driver_data;
|
|
|
|
data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, data);
|
|
mutex_init(&data->update_lock);
|
|
|
|
if (kind == fscpos) {
|
|
/* The Poseidon has hardwired temp limits, fill these
|
|
in for the alarm resetting code */
|
|
data->temp_max[0] = 70 + 128;
|
|
data->temp_max[1] = 50 + 128;
|
|
data->temp_max[2] = 50 + 128;
|
|
}
|
|
|
|
/* Read the special DMI table for fscher and newer chips */
|
|
if (kind == fscher || kind >= fschrc) {
|
|
dmi_walk(fschmd_dmi_decode);
|
|
if (dmi_vref == -1) {
|
|
printk(KERN_WARNING FSCHMD_NAME
|
|
": Couldn't get voltage scaling factors from "
|
|
"BIOS DMI table, using builtin defaults\n");
|
|
dmi_vref = 33;
|
|
}
|
|
}
|
|
|
|
/* i2c kind goes from 1-5, we want from 0-4 to address arrays */
|
|
data->kind = kind - 1;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(fschmd_attr); i++) {
|
|
err = device_create_file(&client->dev,
|
|
&fschmd_attr[i].dev_attr);
|
|
if (err)
|
|
goto exit_detach;
|
|
}
|
|
|
|
for (i = 0; i < (FSCHMD_NO_TEMP_SENSORS[data->kind] * 4); i++) {
|
|
/* Poseidon doesn't have TEMP_LIMIT registers */
|
|
if (kind == fscpos && fschmd_temp_attr[i].dev_attr.show ==
|
|
show_temp_max)
|
|
continue;
|
|
|
|
err = device_create_file(&client->dev,
|
|
&fschmd_temp_attr[i].dev_attr);
|
|
if (err)
|
|
goto exit_detach;
|
|
}
|
|
|
|
for (i = 0; i < (FSCHMD_NO_FAN_SENSORS[data->kind] * 5); i++) {
|
|
/* Poseidon doesn't have a FAN_MIN register for its 3rd fan */
|
|
if (kind == fscpos &&
|
|
!strcmp(fschmd_fan_attr[i].dev_attr.attr.name,
|
|
"pwm3_auto_point1_pwm"))
|
|
continue;
|
|
|
|
err = device_create_file(&client->dev,
|
|
&fschmd_fan_attr[i].dev_attr);
|
|
if (err)
|
|
goto exit_detach;
|
|
}
|
|
|
|
data->hwmon_dev = hwmon_device_register(&client->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
data->hwmon_dev = NULL;
|
|
goto exit_detach;
|
|
}
|
|
|
|
revision = i2c_smbus_read_byte_data(client, FSCHMD_REG_REVISION);
|
|
printk(KERN_INFO FSCHMD_NAME ": Detected FSC %s chip, revision: %d\n",
|
|
names[data->kind], (int) revision);
|
|
|
|
return 0;
|
|
|
|
exit_detach:
|
|
fschmd_remove(client); /* will also free data for us */
|
|
return err;
|
|
}
|
|
|
|
static int fschmd_remove(struct i2c_client *client)
|
|
{
|
|
struct fschmd_data *data = i2c_get_clientdata(client);
|
|
int i;
|
|
|
|
/* Check if registered in case we're called from fschmd_detect
|
|
to cleanup after an error */
|
|
if (data->hwmon_dev)
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(fschmd_attr); i++)
|
|
device_remove_file(&client->dev, &fschmd_attr[i].dev_attr);
|
|
for (i = 0; i < (FSCHMD_NO_TEMP_SENSORS[data->kind] * 4); i++)
|
|
device_remove_file(&client->dev,
|
|
&fschmd_temp_attr[i].dev_attr);
|
|
for (i = 0; i < (FSCHMD_NO_FAN_SENSORS[data->kind] * 5); i++)
|
|
device_remove_file(&client->dev,
|
|
&fschmd_fan_attr[i].dev_attr);
|
|
|
|
kfree(data);
|
|
return 0;
|
|
}
|
|
|
|
static struct fschmd_data *fschmd_update_device(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct fschmd_data *data = i2c_get_clientdata(client);
|
|
int i;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
|
|
|
|
for (i = 0; i < FSCHMD_NO_TEMP_SENSORS[data->kind]; i++) {
|
|
data->temp_act[i] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_TEMP_ACT[data->kind][i]);
|
|
data->temp_status[i] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_TEMP_STATE[data->kind][i]);
|
|
|
|
/* The fscpos doesn't have TEMP_LIMIT registers */
|
|
if (FSCHMD_REG_TEMP_LIMIT[data->kind][i])
|
|
data->temp_max[i] = i2c_smbus_read_byte_data(
|
|
client,
|
|
FSCHMD_REG_TEMP_LIMIT[data->kind][i]);
|
|
|
|
/* reset alarm if the alarm condition is gone,
|
|
the chip doesn't do this itself */
|
|
if ((data->temp_status[i] & FSCHMD_TEMP_ALARM_MASK) ==
|
|
FSCHMD_TEMP_ALARM_MASK &&
|
|
data->temp_act[i] < data->temp_max[i])
|
|
i2c_smbus_write_byte_data(client,
|
|
FSCHMD_REG_TEMP_STATE[data->kind][i],
|
|
FSCHMD_TEMP_ALERT_MASK);
|
|
}
|
|
|
|
for (i = 0; i < FSCHMD_NO_FAN_SENSORS[data->kind]; i++) {
|
|
data->fan_act[i] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_FAN_ACT[data->kind][i]);
|
|
data->fan_status[i] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_FAN_STATE[data->kind][i]);
|
|
data->fan_ripple[i] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_FAN_RIPPLE[data->kind][i]);
|
|
|
|
/* The fscpos third fan doesn't have a fan_min */
|
|
if (FSCHMD_REG_FAN_MIN[data->kind][i])
|
|
data->fan_min[i] = i2c_smbus_read_byte_data(
|
|
client,
|
|
FSCHMD_REG_FAN_MIN[data->kind][i]);
|
|
|
|
/* reset fan status if speed is back to > 0 */
|
|
if ((data->fan_status[i] & FSCHMD_FAN_ALARM_MASK) &&
|
|
data->fan_act[i])
|
|
i2c_smbus_write_byte_data(client,
|
|
FSCHMD_REG_FAN_STATE[data->kind][i],
|
|
FSCHMD_FAN_ALARM_MASK);
|
|
}
|
|
|
|
for (i = 0; i < 3; i++)
|
|
data->volt[i] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_VOLT[i]);
|
|
|
|
data->global_control = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_CONTROL);
|
|
|
|
/* To be implemented in the future
|
|
data->watchdog[0] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_WDOG_PRESET);
|
|
data->watchdog[1] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_WDOG_STATE);
|
|
data->watchdog[2] = i2c_smbus_read_byte_data(client,
|
|
FSCHMD_REG_WDOG_CONTROL); */
|
|
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
}
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return data;
|
|
}
|
|
|
|
static int __init fschmd_init(void)
|
|
{
|
|
return i2c_add_driver(&fschmd_driver);
|
|
}
|
|
|
|
static void __exit fschmd_exit(void)
|
|
{
|
|
i2c_del_driver(&fschmd_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Hans de Goede <j.w.r.degoede@hhs.nl>");
|
|
MODULE_DESCRIPTION("FSC Poseidon, Hermes, Scylla, Heracles and "
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"Heimdall driver");
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MODULE_LICENSE("GPL");
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module_init(fschmd_init);
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module_exit(fschmd_exit);
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